diff --git a/clients/b2/b2client.cpp b/clients/b2/b2client.cpp
index 099a32a954..3a7aae190f 100644
--- a/clients/b2/b2client.cpp
+++ b/clients/b2/b2client.cpp
@@ -748,7 +748,7 @@ void B2Client::resize(const QSize& s)
 
 void B2Client::borders(int &left, int &right, int &top, int &bottom) const
 {
-    left = right = thickness + 1;
+    left = right = thickness;
     top = buttonSize + 4;
     bottom = thickness + (isResizable() ? 4 : 0);
 }